Avenetti appeals from the summary judgment entered in favor of the Commissioner of the Social Security Administration (Commissioner). He challenges the district court’s interpretation of the then-applicable Medical Listing 1.13, 20 C.F.R. Part 404, Subpt. P, App. 1 § 1.13 (1999) (Listing 1.13). We have jurisdiction pursuant to 28 U.S.C. § 1291, and we affirm. 1
I.
Avenetti served in the United States Navy and later worked as a laborer until August 21, 1995, when he was involved in a serious automobile accident. Among other injuries, Avenetti suffered third-degree burns over approximately 37% of his body.
*1124 Avenetti was hospitalized for two months during which he underwent several surgical operations, including multiple skin grafts. He was then transferred to a rehabilitation unit for one month.
After discharge, Avenetti was under the care of a specialist in physical medicine and rehabilitation. Avenetti required two additional inpatient reconstructive procedures and later underwent two additional procedures on an outpatient basis.
On August 8, 1996, the Social Security Administration (SSA) concluded that Avenetti was disabled and made its finding retroactive to the date of the accident. The SSA concluded that his condition met Listing 1.13.
On October 14, 1997, the SSA reviewed Avenetti’s status pursuant to 20 C.F.R. § 404.1594, and concluded that he had recovered sufficiently such that he was no longer disabled. The SSA notified Avenet-ti of its conclusion on November 1, 1998, and stated that his benefits would expire on January 1,1999.
Avenetti filed a request for reconsideration and, after a hearing, a disability hearing officer found that Avenetti was not disabled. At Avenetti’s request, an additional hearing was conducted before an Administrative Law Judge (ALJ) on August 4, 1999, resulting in a determination that Avenetti was not disabled as of January 1,1999.
After an unsuccessful appeal to the Appeals Council, Avenetti filed an action in the district court. The district court entered summary judgment in favor of the Commissioner, and Avenetti filed a timely appeal.
II.
The central issue in this appeal is the proper interpretation of the then-applicable Listing 1.13, which read:
Soft tissue injuries of an upper or lower extremity requiring a series of staged surgical, procedures within 12 months after onset for salvage and/or restoration of major function of the extremity, and such major function was not restored or expected to be restored within 12 months after onset.
20 C.F.R. Pt. 404, Subpt. P, App. 1, § 1.13.
The district court adopted the interpretation of three circuits,
see Knepp v. Apfel,
We review a district court’s judgment upholding the Commissioner’s denial of benefits de novo.
See Moisa v. Barnhart,
We have not specifically addressed whether deference applies to an ALJ’s interpretation of a disability listing. The
*1125
Commissioner, however, has not argued that any deference applies to the ALJ’s interpretation. Therefore, this potential argument is waived.
See Smith v. Marsh,
III.
The Third, Sixth and Seventh Circuits have adopted the same interpretation of Listing 1.13, and each did so without according any deference to the SSA’s or ALJ’s legal interpretation.
See Knepp,
The Sixth Circuit adopted the same analysis shortly thereafter. It held that “[ujnder listing 1.13, a claimant is deemed disabled as a result of his having been rendered unavailable for employment due to the surgical procedures .... ”
Lapinsky,
More recently, the Third Circuit has adopted the same interpretation in
Knepp.
The Eighth Circuit, by contrast, rejected a requirement that surgery render the patient unavailable for work, and instead only required that the surgeries were “staged” and they “were undertaken solely for the purpose of relieving his pain, or for the purpose of restoring strength and function.... ”
Senne,
Avenetti’s proposed interpretation, relying on
Senne,
raises two highly problematic issues. First, as the Seventh Circuit reasoned, “[i]f the regulations ... were intended to grant benefits to one who has lost the use of an extremity for twelve months or more, then the wording of the listing would have been that simple.”
Waite,
Second, under Avenetti’s interpretation, once a person qualifies for Listing 1.13, he or she will be entitled to lifetime disability benefits, no matter how much improvement occurs. As such, the disability finding would be permanent because no causal relationship between surgery and disability would be required, nor would there be any requirement that the claimant be actually impaired in the slightest after the original twelve-month period. It is highly implausible that the SSA meant to create a perpetual entitlement to disability benefits regardless of actual impairment. Avenetti has not provided any limiting principle that would prevent Listing 1.13 from automatically providing lifetime benefits under his interpretation.
*1126
We are persuaded by the reasoning of the Third, Sixth, and Seventh Circuits, and hold that Listing 1.13 requires that a person be rendered unable to work because of staged surgical procedures. Listing 1.13 is directed towards individuals who, while otherwise not qualifying as disabled, are unable to work because of their need for staged restorative surgeries. “When the claimant is no longer unavailable for employment due to the surgical procedures, he is no longer disabled within the contemplation of listing 1.13.”
Lapinsky,
In light of our interpretation of Listing 1.13, there is substantial evidence to support the ALJ’s finding that Avenetti was not disabled as of January 1, 1999. Although Avenetti had two surgical procedures on an outpatient basis after that date, there is no evidence, or indeed even argument, that they were disabling. We therefore affirm summary judgment in favor of the Commissioner.
AFFIRMED.
Notes
. Avenetti's other arguments are addressed by the accompanying memorandum disposition.
